Molded-glass receptacle



Sept. 18, 1928.

2 Sheets-Sheet 1 Filed April '7, 1927 mvENToR I BY ATTORNEY J. E. MARSDEN MOLDED GLASS RECEPTACLE Filed April 7, 1927 2 Sheets-Sheet 2 ATTORNEY Patented Sept. 18, 1928.

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sense JOHN E. MARS DEN, F PHILADELPHIA, PENNSYLVANIA.

MOLDED-GLASS RECEIPTACLE.

'Applieation filed April 7, 1927. Serial No. 181,642.

This invention re ates to the melding of plastic materials nto predetermined shapes according to the form-of the molds and has particular reference to the molding of large thick or heavy glassware adapted for the holding; of various commodities, but more particularly for storage battery purposes. Among the objects of the invention is to practice the molding art as to produces. 1 heavy glass receptacle with a substantial uniformi of thickness or mass whereby the distribution of the glass will be equalized throughout the construction, so that the strain due to cooling or annealing will be uniform, and to provide acooling space for he glass after it is molded.

More specifically, in the construction of a unitary or solid glass receptacle for battery jar purposes, it is desirable to provide partitions for the making of separate cells and for said partitions to be integral parts of the receptacle. To accomplish this result it is of course necessary to provide suitable flare not only for the receptacle itself, but for the under ordinary circumstances there would be certain portions of the receptacle, especially at the places where the partitions are united with the bottom, where there would be a too great thickness of the glass with the tendency for undue stresses or strains in the finished commodity. By my improvement, however, I provide that there shall be an approximation of uniformity of thickness of the glass even though the necessary taper or flare is observed.

With the foregoing and other objects in.

view the invention consists in the arrangement and combination of parts hereinafter described and claimed, and while the invention is not restricted to the exact details of construction disclosed or suggested herein stillfor the purpose of illustrating a prac tical embodiment thereof reference is had to the accompanying drawings in which like reference characters designate the same parts in the several views, and in which Figure 1 is a vertical transverse section onthe line 11 of Fig. 3 and including a fragment of the mold and the receptacle in section. p v

Fig. 2 is a vertical transverse section on the line 22 of Fig. 3, a fragment of the receptacle being in place in the base plate of the mold.

Fig. 3 is a plan view of the base plate and thickness thereof in the various parts and so drawings, 1 show at 10 the mold base plate having vertical opening 11 therethrough in which is slidably and removably fitted what I term a-valve 12, which like the base plate of heavy cast metal such as cast iron so as to withstand the enormous pressures brought to bear thereupon during the moldlIlQ operations.

Fragments of the receptacle being molded are shown in Figs. 1 and 2 at 18,]Fig. 1 showing at 1 1 a portion of one of the vertical partitionsof which there are provided for three in the apparatus illustrated. The receptacle has a bottom or floor 15, the spe ci'lic design. or shape of which may be varied according to the finished product, but herein. illustrated as of substantially rectangular form, and provided with transverse upwardly extending channels 16, shown as two in number according to the number of partitions subdividing the receptacle into separate cells. The partitions 14: extend upward in the same plane as the channels 16.

Extending longitudinally of ther ceptacle and from one partition to the next are a plurality of upwardly projecting mounds of glass 17 which in a battery jar may be regarded as plate rests. and in the same. :ver-' tical planes as these plate rests 17 are formed in the bottom surface of the bottom 15 a similar number of longitudinal channels or grooves 18 shown best in Fig. 2 which indicates, furthermore, how the distribution of the glass and the consequent internal strains or stresses thereon due to cooling or annealing are taken care of. The relation of the channels 18 to the mounds or plate rests 17 shownin 2 is practically the same as the relation of the channels 16 to the lower portions of the partitions 14.

Since the partitions 14 extend vertically throughout the height of the receptacle and a considerable mass of glass would'be inherent along the edges of the partitions or the unions between the partitions and the side walls ofthe receptacle under ordinary circumstances. I provide, inorder toreduce this mass of glass, a plurality of channels 19 extending vertically along the outer surface of the receptacle as shown clearly in Fig. 1

and by dotted lines in 2. These channels 19 taper upward toward the. top edge of the receptacle 13 and have their greatest portions ofthe mold and the depth at the bottom of the receptacle where they merge into the horizontal channels 16.

The means illustrated for effecting the formation of the receptacle above described include the formation of .a seat 20 in the base plate 10 and entirely surrounding the vertical opening 11, andco-0perating with this seat is the upper surface of the valve which is formed with a plurality of ridges 21 extending longitudinally thereof, the outer ends of these ridges registering with short horizontal ridges 22 extending across the bottom of the seat at thecnd portions thereof. As shown in Fig. 3 these longitudinal ridges 21 are disposed in pairs or in a number corresponding to the number of longitudinal grooves or channels formed at 18 in the bottom of the receptacle and which channels are formed by said ridges in the molding operation. Also the valve is provided with transversely and upwardly projecting ridges 23 intersectingthe ridges 21 and which are responsible for the formation of the transverse channels 16 in the bottom surface of the receptacle.

At intervals along theside portions. of

V the base plate seat are formed upwardly projected tongues 24 whose upper ends lie in the same plane as the top surface of the base plate and which consequently register with a rib or tongue portion 95 of the side wall members 26 of the mold and from which result the formation of the sidcchannels 19 which lie in the same plane as the partitions 14.

Agreeableto the usual molding operation of heavy glassware, the base plate 10 and valve 12 are suitably supported upon a base, not shown, and the side members 26 of the mold are supported thereon andsuitably is forced upward with relation to the'base plate 10, thereby stripping orseparating the receptacle from the base plate, the receptacle being subjected at the proper time to the annealing and cooling operations.

I claim: 1. An article of molded glassware having an inner vertical partition therein leading upward from the bottom to the level of the top and having a channel in the bottom surface of. the bottom portion of the receptacle in the plane of said partition, whereby the mass of glassware at the bot-tom is accordingly reduced and distributed as to thick ness.

2. A one-piece article of molded glassware having side walls and inner vertical partitions extending integrally upward from. the bottom to the top thereof, and having vertical channels extending from the bottom all the wayt-o the top along the outer surfaces of said side walls in the planes of said partitions.

3. An article as set forth in claim 2 in i which a bottom channel is provided, the

ends of which merge into the bottom ends of" two oppositely disposed vertical side channels, all in theplane of a singlepartition.

In testimony whereof I afiixmy signature.

' JOHN'E. MARSDEN. 

